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Function of Network Devices January 24, 2007

Posted by warcraft16 in Tech.
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Network Interface Card

A network card, network adapter or NIC (network interface controller) is a piece of computer hardware designed to allow computers to communicate over a computer network.

Wireless network interface

A wireless network interface controller (WNIC) is a network card which connects to a radio-based computer network, unlike a regular network interface controller (NIC) which connects to a wire-based network such as token ring or ethernet.

External Modem & Internal Modem

A modem (from modulate and demodulate) is a device that modulates an analogue carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.

Hub

An Ethernet hub or concentrator is a device for connecting multiple twisted pair or fiber optic Ethernet devices together, making them act as a single segment. Ethernet hubs are also responsible for forwarding a jam signal to all ports if it detects a collision.

Switch

A network switch (or just switch) is a networking device that performs transparent bridging (connection of multiple network segments with forwarding based on MAC addresses) at up to the speed of the hardware.

Router

A router is a computer networking device that forwards data packets across a network toward their destinations, through a process known as routing. A router acts as a junction between two or more networks to transfer data packets among them.

Wireless access point

A wireless access point (WAP or AP) is a device that connects wireless communication devices together to form a wireless network. The WAP usually connects to a wired network, and can relay data between wireless devices and wired devices. Several WAPs can link together to form a larger network that allows “roaming”.

L337 January 20, 2007

Posted by warcraft16 in Personal.
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wht u know about l33t ?. Leet or Leetspeak (often written in Leet as 1337 or 13375934k) is a sociolect variety used primarily on the Internet, particularly in online games.The term itself is derived from the word Elite, meaning “better than the rest,” and generally has the same meaning when referring to the hacking skills of another person.

“English to 1337″ Converter

Maybe Lucky… January 18, 2007

Posted by warcraft16 in Personal.
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Hmm… i was chosen by teacher to be prefect … i was surprised… but i reject it …. becoming prefect it’s not easy job …. anyway i have been burden by other problem …….. anyway i’am a On The Computer 24/7 freak and gamer freak…. As the title said .. i was lucky. The class make agreement and appointed me as Class Monitor….geezz…. as long as i can collect mark for my CoCuriculum.. and maybe i will try my best to become Royal Scout.

Network January 16, 2007

Posted by warcraft16 in Personal.
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what is network ?
network
consists of two or more computers that are linked in order to share resources (such as printers and CD-ROMs), exchange files, or allow electronic communications.For further information, can click on this link.

Horroscopes January 13, 2007

Posted by warcraft16 in Personal.
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I am a Sagittarius.
(Also known as “Archer”)
My Horroscope starts like this:
Usually a Sagittarius will come off as a blissfully happy idiot. In most cases, this first impression will prove accurate. His moronic enthusiasm cannot be dampened by anything – not even by a cinder block falling on his head. ” (Read more)

Techhnolgy & Communication Presentation January 13, 2007

Posted by warcraft16 in Tech.
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As an ICT student i have been assigned to do Presentation. So many type of presentation that i have been doing. And i have been thought to sharing the information. So here i’am. All these presentation may not be good but it really can help those who need it. Presentation

Life…appreciate ur life …. January 11, 2007

Posted by warcraft16 in Personal.
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Rose of Life

I am unfolding gently beneath
your loving touch
Becoming
I let wholeness breath my
petals free
Awareness
Sweet fragrant Spirit touching
senses into life
Wisdom
Giving beauty back to the universe
Knowing
Each petal, sweet miracle of life
Oneness
We are hues of color, yet one
in Spirits blossom

took from netpoets

Photoshop Work Out January 11, 2007

Posted by warcraft16 in Art & Design.
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here few my signature …that i make during i’am in boredem….

1.Photobucket - Video and Image Hosting

2.Photobucket - Video and Image Hosting

3.Photobucket - Video and Image Hosting

4.Photobucket - Video and Image Hosting

Beyond The Game January 11, 2007

Posted by warcraft16 in Personal.
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Photobucket - Video and Image Hosting

Advantages and Disadvantages of a Bus, Ring, Star Network January 11, 2007

Posted by warcraft16 in Personal.
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Bus Network

-Advantages

  • Easy to implement and extend
  • Well suited for temporary networks (quick setup)
  • Initially less expensive than other topologies
  • Cheap

-Disadvantages

  • Difficult to administer/troubleshoot.
  • Limited cable length and number of stations.
  • If there is a problem with the cable, the entire network goes down.
  • Maintenance costs may be higher in the long run.
  • Performance degrades as additional computers are added or on heavy traffic.
  • Low security (all computers on the bus can see all data transmissions).
  • One virus in the network will affect all of them (but not as badly as a star or ring network).
  • Proper termination is required.(loop must be in closed path).
  • If one node fails, the whole network will shut down.
  • If many computers are attached, the amount of data flowing causes the network to slow down.

Ring Network

-Advantages

  • Data is quickly transferred without a ‘bottle neck’. (very fast, all data traffic is in the same direction)
  • The transmission of data is relatively simple as packets travel in one direction only.
  • Adding additional nodes has very little impact on bandwidth
  • It prevents network collisions because of the media access method or architecture required.

-Disadvantages

  • Data packets must pass through every computer between the sender and recipient therefore this makes it slower.
  • If any of the nodes fail then the ring is broken and data cannot be transmitted successfully.
  • It is difficult to troubleshoot the ring.
  • Because all stations are wired together, to add a station you must shut down the network temporarily.
  • In order for all computers to communicate with each other, all computers must be turned on.
  • Total dependence upon the one cable

Star Network

-Advantages

  • Good performance
  • easy to set up and to expand. Any non-centralised failure will have very little effect on the network, whereas on a ring network it would all fail with one fault

-Disadvantages

  • Expensive to install
  • Extra hardware required